JPS62279769A - Data communication equipment - Google Patents

Abstract

PURPOSE:To enable an operator to raise the handset of a telephone set in calling, and to respond a telephone, by switching a circuit to a facsimile side after a perescribed time, on detecting an incoming call from the circuit. CONSTITUTION:At the time of generating an outgoing call from another device, etc., to its own device, a signal to be called is sent to circuits L1 and L2, and it is inputted to a called signal detection circuit 10. The circuit 10, detecting the signal, energizes a power source 20. By detecting the signal to be called, and recognizing it as the incoming call, a CPU31 starts the timepiece of a timer 34. Next, by raising a handset 50 by the operator before timeout, a call state with an outgoing call side is generated. Meanwhile, in case of elapsing a time set in the timer 34, the CPU31 closes a contact with a relay CML2, and opens the contact with a relay CML1. Therefore, the circuits L1 and L2 are connected to a modem 40, and a telephone set 50 is separated from the circuits L1 and L2. Afterwards, a CPU31 executes a facsimile connection processing procedure.

Description

[Detailed description of the invention] 3. Detailed description of the invention [A field of use in business] The present invention relates to a data communication device.

[Prior Art] Conventionally, in this type of device, for example, a facsimile machine equipped with an automatic reception function, when in the automatic reception mode, when a call from the sender is detected, the line is immediately switched off (the telephone outputs a ring tone from 1). (~2 times) It connected to the facsimile machine and automatically started receiving operations.

[Problem to be solved by the invention] For this reason, it is effective when the operator is absent, such as at night, because the transmitter does not have to wait, but during the day,
When the operator is located a little far from the equipment,
If the calling party does not specifically wish to send a facsimile and makes a telephone call for the purpose of conversation, the called party's facsimile automatically receives the call and immediately switches the line from the telephone to the facsimile and uses the CED (Called Station Identification) procedure signal. ) signal (see FIG. 3), an operator who is located at a distance from the device does not have time to move up to the device, pick up the receiver, and talk to the caller.

The telephone and facsimile machine are connected to the same line, and it is common to set the machine to automatic reception mode so that it can receive calls automatically even when the operator is not present, such as at night. No matter how many times the calling party calls, the called party makes a call, and the facsimile machine answers instead.
A situation arises where you are unable to have a conversation.

As mentioned above, conventional facsimile machines with an automatic reception function have the disadvantage that the facsimile responds immediately when a called signal arrives, meaning that an operator located at a distance does not have a chance to answer the call. was there.

[Means for Solving the Problems] The present invention has been made in view of the problems of the prior art described above, and as a means for solving the problems, a method for detecting an incoming call from a line is provided. a call detection means; a timer for measuring a predetermined period of time activated by the detection of a call by the called detector; and after the timer measures a predetermined period of time, the communication line is changed to an attached telephone and connected to a data communication device. and a connecting means.

[Operation] In the above configuration, after a call is detected on the line, a predetermined period of time (sufficient for an operator located at a distance from the data communication equipment to pick up the handset of the telephone being called and answer the telephone) After the time period has elapsed, the line is connected to the facsimile switch 53, allowing the operator to pick up the handset of the telephone being called and answer the call.

[Example 1] Hereinafter, an example according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an embodiment according to the present invention, in which 1 is a facsimile control unit, 50 is a telephone attached to the facsimile machine, and 60 is a recording unit for printing out received data, which is composed of a thermal printer. , 70 is a reading unit that reads the transmitted original. Further, Ll and L2 are public telephone lines.

The facsimile control unit 1 connects the line L1. A called signal detection circuit 10 which detects a called signal from L2 and is constantly supplied with power is energized by the detection of a called signal by the called signal detection circuit 10 and supplies power to the control unit 30 and modem 40. A power supply circuit 20 is provided. Further, 30 is a microprocessor (CPU) 31 that executes various control operations according to the control procedure shown in FIG. 2 stored in a built-in ROM 33;
A control section includes B2, a RAM 33, and a timer 34 and controls the entire apparatus, and 40 is a modulation/demodulation device (modem) that performs waveform conversion (modulation and demodulation) between a transmission waveform and an original image signal. It also includes relays CMLx and CML2 that switch the lines LL and L2 to the telephone 50 side and the modem side.

In the above configuration, when the device is not operating, relays CMLz and CML2 are in the solid line positions in the figure, and lines L1. L2 is connected to the called signal detection circuit 10 and the telephone 50. When a call is made to the own device from another device in this state, a 16H2 called signal is sent intermittently to L2 from the switching equipment of the office at predetermined intervals. Telephone 50 causes a calling bell to ring in response to this called signal.

At the same time, the called signal is also input to the called signal detection circuit 10,
When the called signal detection circuit 10 detects this called signal, it energizes the power supply 20 to supply power to the control section 30 and modem 40.

When the control section 30 is supplied with power, it executes the reception control shown in FIG. 2 according to the control procedure stored in the ROM 32.

The CPU 31 first detects the called signal detection circuit 10 in step S1.
Count the 16H2 called signals detected by
The count result is held in the RAM 33. Then, in step S2, it is checked whether or not a predetermined number (for example, 3) has been counted up, and if it is less than the predetermined number, the process returns to step S1 and waits for the predetermined number to be counted up. At this time, the timer 34 is also activated, and if the predetermined number is not reached even after a certain period of time has elapsed, the previously detected called signal is invalidated and the process proceeds to step S22, where the power source 20 is turned off and the power source is turned off. The process is automatically stopped and the process is completed in preparation for the next call detection, etc.

When a predetermined number of called signals are detected in step S2, it is recognized that the call is indeed to the own device, and the process proceeds to step S3, where the wait timer time is set in the timer 34 and time measurement is started. The wait timer time refers to the time from when a call to the own device is detected to when the line L2 is switched to the modem 40. That is, it is a line switching waiting time that allows time for a person near the telephone 50 to answer the telephone 50.

Steps S4 and S5 are timeout determination steps for checking whether the waiting time set in the timer 34 has expired. Here, the operator calls the phone 50 before timeout.
When you pick up the receiver and go off-hook, a DC loop is formed on lines LL and L2, as is well known, and when the switching equipment of the office detects this, it reverses the voltage polarity of lines t, x, t, and 2, and the calling side and enter into a call state. The CPU 31 detects this by detecting the reversal of the polarity of the line, and thereafter turns off the power supply 20 in step S6 since the telephone 50 is in a normal conversation state. Therefore, in this case, relay CML
L, CML2 remains in the position shown in Figure 1, and the line L
L, L2 remain connected to telephone line T1°T2.

On the other hand, when the time set in the timer 34 has elapsed, the process advances from step S4 to step S7, where the CPU 31 outputs a switching signal to the control signal line 35, energizes relays CML1 and CML2, and closes and closes the contacts of relay CML2. ,
Relay CML.

Open the contacts. Therefore, line L1. L2 is relay C
It is connected to the modem 40 via ML2, and the telephone 50 is disconnected from the lines LL and L2. At this time, a DC loop is formed in the line L2 by the modem 40, and communication with the calling source becomes possible.

After that, the CPU 31 executes the facsimile connection processing procedure from step 38 to step S14, and further executes the facsimile connection processing procedure from step S15.
A CFR (reception readiness confirmation) signal is sent out to prepare for data transmission. Then, in the following steps S1 [5 to S19], image information reception and confirmation processing is performed according to the CCITT prescribed procedure. When all data transmission processing is completed, a disconnection command (DCN) is sent from the called destination (image signal transmission source), so the process waits for reception of this DCH in step S20, and when the DCN is received, the process proceeds to step 521. Relay C
MLz and CML2 are deenergized and placed in the position shown in FIG.

At this time, if the telephone 50 is on-hook, line Lz+L2
The DC loop is opened and the line is opened. Finally, in step S22, the power supply 20 is turned off.

The communication control procedure during this time is shown in FIG.

Although this embodiment has been explained using a facsimile machine as an example, the present invention is applicable not only to facsimile machines but also to all data communication devices such as telex.

[Effects of the Invention] As described above, according to the present invention, it is possible to give the operator time to pick up the telephone receiver until the line is switched from the telephone to the data communication device side when a call is detected. Therefore, the operator can use this time to have a conversation with the caller, thereby saving the caller the waste of making repeated calls.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a facsimile device that is an embodiment of the present invention, FIG. 2 is a flowchart showing a control procedure for the facsimile device of FIG. 1, and FIG. 3 is a flow chart showing a facsimile communication control procedure of this embodiment. It is a diagram. In the figure, 10... called signal detection circuit, 20... power supply,
30...Control unit, 31...CPU, 32...-RO
M, 34...Timer, 40...Modem, CMLL,
CML2...Relay.

Claims (1)

[Claims] In a data communication device capable of exchanging information with other devices via a communication line, a called detection means detects an incoming call from the line, and is activated when the called detection means detects an incoming call. and a switching means for switching the communication line to an attached telephone or a data communication device, and the switching means is connected to the telephone after the predetermined time set by the clocking means has been measured. A data communication device characterized in that a communication line that is currently being used is switched to a data communication device.